At time t $=0,$ a $3\mathrm{.}0$ kg particle with veloc$-$

$$

ity v

$=(5\mathrm{.}0$ m$/$s$)$i$$

$(6\mathrm{.}0$ m$/$s$)$j$$

is at x $=3\mathrm{.}0$ m$,$ y$=8\mathrm{.}0$ m$.$ It is pulled

by a $7\mathrm{.}0$ N force in the negative x direction. About the origin, what

are $($a$)$ the particle$$s angular momentum, $($b$)$ the torque acting on the

particle, and $($c$)$ the rate at which the $$ angular momentum is changing?